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GRE Math Challenge #14-Driving at 48 miles per hour

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GRE Math Challenge #14-Driving at 48 miles per hour [#permalink] New post 07 Sep 2014, 06:26
Expert's post
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Question Stats:

87% (00:35) correct 12% (01:04) wrong based on 31 sessions
Driving at 48 miles per hour, how many minutes will take to drive 32 miles?
A. 2/3
B. 3/2
C. 40
D. 45
E. 2400
[Reveal] Spoiler: OA

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Re: GRE Math Challenge #14-Driving at 48 miles per hour [#permalink] New post 05 Apr 2016, 15:01
answer c????
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Re: GRE Math Challenge #14-Driving at 48 miles per hour [#permalink] New post 05 Apr 2016, 15:16
Expert's post
rampragash wrote:
answer c????


Yes, that is correct.
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Re: GRE Math Challenge #14-Driving at 48 miles per hour [#permalink] New post 05 Apr 2016, 22:09
Yups, 40 mins to drive 32 miles.
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Re: GRE Math Challenge #14-Driving at 48 miles per hour [#permalink] New post 09 May 2016, 15:59
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sandy wrote:
Driving at 48 miles per hour, how many minutes will take to drive 32 miles?
A. 2/3
B. 3/2
C. 40
D. 45
E. 2400


Solution:

We know that rate x time = distance, so time = distance/rate. We must determine how many minutes it will take to drive 32 miles while driving at a rate of 48 miles per hour.

Time = 32/48 hours

Time = 2/3 hours

Now we can convert 2/3 hours to minutes.

2/3 x 60 = 40 minutes.

Answer: C
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Re: GRE Math Challenge #14-Driving at 48 miles per hour [#permalink] New post 08 Aug 2019, 11:35
With problems like these I most often use dimensional analysis (that's what my chemistry teacher called it). Attached is the general process.
Attachments

daum_equation_1565293026659.png
daum_equation_1565293026659.png [ 131.14 KiB | Viewed 396 times ]

Re: GRE Math Challenge #14-Driving at 48 miles per hour   [#permalink] 08 Aug 2019, 11:35
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GRE Math Challenge #14-Driving at 48 miles per hour

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